N235WC

Substantial
None

Conkey/Wapelhorst LANCAIR 235 S/N: 001

Accident Details

Date
Saturday, July 20, 1996
NTSB Number
SEA96LA162
Location
COTTAGE GROVE, OR
Event ID
20001208X06377
Coordinates
43.710731, -123.029838
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
2
Total Aboard
2

Probable Cause and Findings

release of the main landing gear locking mechanism for undetermined reason(s).

Aircraft Information

Registration
N235WC
Make
CONKEY/WAPELHORST
Serial Number
001
Year Built
1992
Model / ICAO
LANCAIR 235

Registered Owner (Historical)

Name
AUMAN JAMES L
Address
724 W STATE ST
Status
Deregistered
City
SYCAMORE
State / Zip Code
IL 60178-1332
Country
United States

Analysis

On July 20, 1996, approximately 1600 Pacific daylight time, a Conkey/Wapelhorst homebuilt Lancair 235, N235WC, registered to and being flown by a private pilot, was substantially damaged when the left main landing gear collapsed during the takeoff roll at the Cottage Grove airport, Cottage Grove, Oregon. The pilot and passenger were uninjured. Visual meteorological conditions prevailed and no flight plan had been filed. The flight, which was to have been local, was to be operated under 14CFR91.

The pilot reported that he commenced the takeoff roll on runway 33, with an estimated wind of 05-10 knots from 010 degrees. As the aircraft accelerated through 55-60 knots the aircraft's left wing suddenly dropped. The pilot aborted the takeoff and the aircraft slid approximately 200 feet before leaving the west side of the runway and eventually impacting a parked Stinson 30 feet west of the runway.

The pilot reported that he "could not determine any failures that (would have) caused the left wheel to collapse inboard." The Lancair main landing gear fold inboard into wheel wells in the lower fuselage. They are normally held in the down and locked position by hydraulic pressure.

The pilot reported observing that all three gear down lights were illuminated during the takeoff checklist.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# SEA96LA162